Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee SDS-Max Spindle Assembly
Model Number: 38-50-5316
The Milwaukee 38-50-5316 is a genuine OEM SDS-Max Spindle Assembly for the 5317-20 SDS-Max Rotary Hammer. The spindle assembly is the front-end core of the hammer mechanism at the tool holder: it holds the SDS-Max bit and contains the components that transfer the tool's percussive blow into the bit. On an SDS-Max hammer, the piston drives a striker that impacts the spindle assembly, and the assembly's internal rings and barrel channel that impact energy into the bit shank while the spindle rotates the bit, which is what lets an SDS-Max hammer both drill and chip masonry and concrete. Milwaukee supplies this as a complete assembly, documented as including the SDS-Max spindle, the brake ring, the rebound rings, the back press ring, the spindle sleeve pins, the steel ring, the spring ring, and the barrel, so the impact-transfer components come matched and correctly arranged rather than being sourced individually. Because the spindle assembly takes the full repeated impact of the hammer mechanism, its internal components wear, and a worn or damaged spindle assembly produces reduced impact energy, poor drilling and chipping performance, or a bit that will not seat or retain correctly. Replacing it with the correct genuine Milwaukee OEM assembly restores full hammer performance at the tool holder.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before placing your order, since running production changes can alter part compatibility within the same catalog number. This spindle assembly is documented at Figure 17 on the 5317-20 SDS-Max Rotary Hammer service parts list, where it works with the sliding collar, locking sleeve, spring retainers, bearing shield assembly, and the striker assembly of the hammer mechanism. Those companion parts are separate service items, so refer to your tool's parts diagram for the correct part numbers, and inspect the striker, seals, and bearing shield when servicing the spindle assembly since these parts work together. Because replacing the spindle assembly involves opening the barrel and hammer mechanism, follow the correct service procedure and re-grease with the Milwaukee-specified grease, type GE 00 Urethyn grease (No. 49-08-5355), on reassembly as the bulletin directs.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- SDS-Max Spindle Assembly for the 5317-20 SDS-Max Rotary Hammer
- The front-end core of the hammer mechanism at the tool holder
- Holds the SDS-Max bit and transfers the hammer blow into the bit
- Channels the striker's impact energy into the bit while rotating it
- Supplied as a complete assembly with matched impact-transfer components
- Documented to include the spindle, brake ring, rebound rings, and back press ring
- Also includes the spindle sleeve pins, steel ring, spring ring, and barrel
- Restores full impact energy and hammer performance when worn
- Corrects reduced impact, poor drilling, or a bit that will not retain
- Documented at Figure 17 on the 5317-20 service parts list
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 38-50-5316
- Official Description: SDS-Max Spindle Assembly
- Component Type: SDS-Max hammer spindle and barrel assembly
- Documented Contents: SDS-Max spindle (44-82-5317), brake ring (43-06-5317), rebound rings (45-88-5325), back press ring (34-60-5321), spindle sleeve pins (44-60-5316), steel ring (44-90-5317), spring ring (44-90-5319), barrel (38-50-5323)
- Primary Fitment: 5317-20 SDS-Max Rotary Hammer
- Lubrication: Type GE 00 Urethyn grease, No. 49-08-5355
- Also Referenced On: Verify additional applications using Milwaukee's online parts lookup
- Parts Diagram Position: Figure 17 on the 5317-20 service parts list
- Quantity: Sold as an assembly, (1) required per tool
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 38-50-5316 SDS-Max Spindle Assembly, as documented by Milwaukee (spindle, brake ring, rebound rings, back press ring, spindle sleeve pins, steel ring, spring ring, and barrel)
The sliding collar, locking sleeve, spring retainers, bearing shield assembly, striker assembly, and grease that work with the spindle assembly are NOT included, vary by tool, and are sold separately - refer to your tool's parts diagram for the correct part numbers and quantities. Always verify by serial number using Milwaukee's online parts lookup before ordering.
